/* Reentrant versions of sbrk system call. This implementation just
|
/* Reentrant versions of sbrk system call. This implementation just
|
calls the stat system call. */
|
calls the stat system call. */
|
|
|
#include <reent.h>
|
#include <reent.h>
|
#include <unistd.h>
|
#include <unistd.h>
|
#include <_syslist.h>
|
#include <_syslist.h>
|
|
|
/* Some targets provides their own versions of these functions. Those
|
/* Some targets provides their own versions of these functions. Those
|
targets should define REENTRANT_SYSCALLS_PROVIDED in TARGET_CFLAGS. */
|
targets should define REENTRANT_SYSCALLS_PROVIDED in TARGET_CFLAGS. */
|
|
|
#ifdef _REENT_ONLY
|
#ifdef _REENT_ONLY
|
#ifndef REENTRANT_SYSCALLS_PROVIDED
|
#ifndef REENTRANT_SYSCALLS_PROVIDED
|
#define REENTRANT_SYSCALLS_PROVIDED
|
#define REENTRANT_SYSCALLS_PROVIDED
|
#endif
|
#endif
|
#endif
|
#endif
|
|
|
/* If MALLOC_PROVIDED is defined, we don't need this function. */
|
/* If MALLOC_PROVIDED is defined, we don't need this function. */
|
|
|
#if defined (REENTRANT_SYSCALLS_PROVIDED) || defined (MALLOC_PROVIDED)
|
#if defined (REENTRANT_SYSCALLS_PROVIDED) || defined (MALLOC_PROVIDED)
|
|
|
int _dummy_sbrk_syscalls = 1;
|
int _dummy_sbrk_syscalls = 1;
|
|
|
#else
|
#else
|
|
|
/* We use the errno variable used by the system dependent layer. */
|
/* We use the errno variable used by the system dependent layer. */
|
#undef errno
|
#undef errno
|
int errno;
|
int errno;
|
|
|
/*
|
/*
|
FUNCTION
|
FUNCTION
|
<<_sbrk_r>>---Reentrant version of sbrk
|
<<_sbrk_r>>---Reentrant version of sbrk
|
|
|
INDEX
|
INDEX
|
_sbrk_r
|
_sbrk_r
|
|
|
ANSI_SYNOPSIS
|
ANSI_SYNOPSIS
|
#include <reent.h>
|
#include <reent.h>
|
void *_sbrk_r(struct _reent *<[ptr]>, size_t <[incr]>);
|
void *_sbrk_r(struct _reent *<[ptr]>, size_t <[incr]>);
|
|
|
TRAD_SYNOPSIS
|
TRAD_SYNOPSIS
|
#include <reent.h>
|
#include <reent.h>
|
void *_sbrk_r(<[ptr]>, <[incr]>)
|
void *_sbrk_r(<[ptr]>, <[incr]>)
|
struct _reent *<[ptr]>;
|
struct _reent *<[ptr]>;
|
size_t <[incr]>;
|
size_t <[incr]>;
|
|
|
DESCRIPTION
|
DESCRIPTION
|
This is a reentrant version of <<sbrk>>. It
|
This is a reentrant version of <<sbrk>>. It
|
takes a pointer to the global data block, which holds
|
takes a pointer to the global data block, which holds
|
<<errno>>.
|
<<errno>>.
|
*/
|
*/
|
|
|
void *
|
void *
|
_sbrk_r (ptr, incr)
|
_sbrk_r (ptr, incr)
|
struct _reent *ptr;
|
struct _reent *ptr;
|
size_t incr;
|
size_t incr;
|
{
|
{
|
char *ret;
|
char *ret;
|
void *_sbrk(size_t);
|
void *_sbrk(size_t);
|
|
|
errno = 0;
|
errno = 0;
|
if ((ret = (char *)(_sbrk (incr))) == (void *) -1 && errno != 0)
|
if ((ret = (char *)(_sbrk (incr))) == (void *) -1 && errno != 0)
|
ptr->_errno = errno;
|
ptr->_errno = errno;
|
return ret;
|
return ret;
|
}
|
}
|
|
|
#endif /* ! defined (REENTRANT_SYSCALLS_PROVIDED) */
|
#endif /* ! defined (REENTRANT_SYSCALLS_PROVIDED) */
|
|
|
